Finding the Fourth Proportional to 1,088.51, 1,501.78 and 616.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.51 : 1,501.78 = 616.34 : x
2. Step 2: Convert to fraction form
   1,088.51/1,501.78 = 616.34/x
3. Step 3: Cross multiply
   1,088.51x = 1,501.78 × 616.34
4. Step 4: Simplify right side
   1,088.51x = 925,607.09
5. Step 5: Solve for x
   x = 925,607.09/1,088.51
6. Step 6: Final answer
   x = 850.34